Carton folding machine



Aug. 8, 1950 w. H. I'NMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 1 FiledAug. 9, 1946 INVENTOR. ma/wfl kmm Aug. 8, 1950 w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 2 Aug. 8, 1950w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 l4 Sheets-Sheet 5 INVENTOR.

Aug. 8, 1950 v w. H. INMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 4'Filed Aug. 9, 1 946 INVENTOR.

Aug. 8, 1950 w. H. INMAN CARTON FOLDING MACHINE Filed Aug. 9, 1946 14Sheets-Sheet 5 INVENTOR.

is Mrnj 8- 1950 w. H. INMAN 2,518,014 I CARTON FOLDING MACHINE FiledAug. 9, 1946 14 Sheets-Sheet 6 Aug. 8, 1950 w. H. lNMAN CARTON FOLDINGMACHINE Filed Aug. 9, 1946 14 Sheets-Sheet '7 INVENTOR. Wfifzmaw 1950 w.H. INMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 8 IN VEN TOR.

Aug. 8, 1950 w. H. INMAN 2,518,014

CARTON FOLDING MACHINE Filed Au 9, 1946 14 Sheets-Sheet 9 INVENTOR.

a 2 Q E;

Aug. 8, 1950 w. H. INMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 10 FiledAug. 9, 1946 Aug. 8, 1950 w. H. INMAN 2,513,014

'CARTON FOLDING MACHINE Filed Aug. 9, 1946 l4 Sheets-Sheet ll YINVENTOR.

Aug. 8, 1950 w, mm; 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 12 INVENTOR-is zyiz aivzgy 8, 1950 w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9,. 1946 14 Sheets-Sheet 13 Aug. 8,1950 w. H. lNMAN CARTON FOLDING MACHINE l4 Sheets-Sheet 14 INVENTOR.

Eli 07am Filed Aug. 9, 1946 Patented Aug. 8, 1950 UNITED j STATES PATENTOFFICE v i i f. 2,51s,0 1 i CARTON FOLDINGMACHINE I V 7 William H.Inman, .Newark,.N. assignor to t a Bloomer .Bros., Company NeWark, N.Y., a;c orh poration of New York p v A i ation August 9, 1946, SerialNo.689,415 t This invention relates'to machines for fold- .1;-

ingblanks of cardboard or other sheet material to form containers orcartons, one object of the invention being to provide a machine adaptedfor folding a one piece blank to form a fluid tight 16 claims. (01.9354

carton of the variety having side walls continubusly connected at theircorners by integral flaps folded to overlap in pairs against oppositeside walls andinterlock' with each other, to maintain the carton inerected shape, substantially as disclosed, for example, inniy'copendingpatent 'application', Serial No.- 567g489, filed December 9, 1944, whichhas matured into Patent No. 2,419,646. Another object of the inventionis'to provide an eillcient machine of the above character capable ofreliably folding and securing such cartons in I erected shape at a rapidand economical rate.

A further object is to provide a machine of the above character having asimple and practical type of construction conveniently adaptedto receivethe blanks and deliver the erected cartons To these and'other ends theinvention resides "in certain improvements and combination's of parts,all as will Ice-hereinafter more fully 'describecL'the novel featuresbeing pointed out in theiclaims'at the end'of' the specification.

In the drawings? I I Fig. Us a top plan view of a machine embodyingthepresent invention with the parts shown in p'osition to receiveacartonblank; 1

- Fig. 2 is an end elevation ofthe machine as viewed from the left inFig. 1;

Fig. 3 is a fragmentary view 01 the carton handling parts'shown in Fig.2 with acarton .blank applied thereto; a

.1 Fig. 4 is a top plan viewof parts shown in Fig 3, including theblankto be folded;

an I

" Fig. 5 is a perspective view of a carton folded by t a the machine; I

- Fig. 6 is an enlarged top plan view similar to f Fig. 4, but showingthe carton partly 'foldedi' v i Fig. 7 is an end elevation, partlybroken away, as seen from the left in Fig. 6; t

Fig. '8 is. a top plan view, partly broken away, f si'rnilar to Fig. 6,but showingthe further stage of folding;

Fig. 9 is anend elevation as viewedf frorn theleft in .Fig. 8';

Fig. 10 is'a view similar to Fig. 9, but showing further foldingof thecarton;

. Fig. 11 is a top plan view-showing the final ,folding step i Fg. 12 isan enlarged sectional elevation on, the l i nel2--l2inFig.1; i r

carton in: a

Fig 13 is an end elevation as viewedfro mthe left inFig. 11;. i

V Fig. 14 is a sectional elevation showing the folded carton ready forremoval. fromhthezma chine;

T Fig. 15 is a side elevation substantiallylas seen from the left inFig. 9, and showing mechanism; r Fig. 16 is aview similar to Fig. 15substantially asseenfromtherightinl 'ig.9;:

Fig. 17: is a sectional:elevation onthe line I l l 1 the driving in Fig.15;showir'ig1the mechanism foripperating one'of the blank. foldingwings;

' Fig. 15, .showingmechanism for operating .the

blank folding arms.

The invention provides .a machine particularly adapted for erectingacarton such-as disclosed in my said patent application and hereillustrated as a blank in Fig. 4 and in erected condition in -Fig. 5,comprisinga. bottom" 3llfand upwardly folded pairs of opposite sidewalls 3|. and .32 and '33. and 34. The adjacent side walls at eachcorner of the box are integrally. connected by folded-corner webs orflaps to '38, inclusive, which. are

.each 'foldedmedially as at 39. Flaps 3B and 31 have on their outerwallstopextensions 40 and 4| which are folded over inwardly anddownwardly :between the flaps and the adjacentside walls-3| andz32, thelines of fold having therein slots 42 adapted to receive and interlockwith hooks 43 .formed at the tops of the innerwalls of theother cornerflaps 35 and 38, respectively. -,Each;; hook '43 has an, undercut edge-44 which snaps over the endv of the corresponding slot 42,;so,astointerposition. A ,fluid tighticarton is thus provided with bottom andside walls having continuous,

- folded, leakproof connection with eachother be- Theembodiment' oi theinvention hereindisclosed; by way of illustration. comprises,prefervbearings 41 supporting. the ,end portions of an.

support a pair of spindles 54 and 55 extending parallel with each otheralong the opposite sides of support 49, as shown. =-A pair of-wing's '6and 51 are mounted on the"'s'pindles, -respe'ctively,

for oscillating movement from the substantially 1, up to and somewhatbeyond a vertical position, as shown in Fig. 9, each wing having 'for'this' Y purpose a plurality of knuckles rotatably embracingits spindle.Th'e'wingsareraisedeand lowered by mechanism connected therewith, and.the spindles F54 and 55 are separately oscillated for actuatingcertainother :parts, 2315' hereafter described.

351 -Ffor raising ear-ton wall 34,?ha's brackdis "5% fixed on itsopposite ends i and supporting a pair of plates each having an edgeturned'to provide an elongated abutment :59, Figs. .1 to 3, inclusive,in fixed relation with the' wing. Wing 51 is provided alsoalongzitsifree iedge with-three spaced 'guides 60, ='-6l,-iand $2, Fig.l, in the 'form of U-shaped clips each-fixedsat one'endCFig. 'totheba'ck of "the Wing and having its oth'er' end l5 horizontal, blankreceiving position shown ln Fig pivotally .connected with one end of -alink -82 projecting around over thezupper face of the wing in spaced'relatio-n thereto, to receive and position one edgeof the'bl'arikflascshownin Fig. 4. Guides $60 and 5152 carry curved-'fi-rrg'er extensions 63 and 64 for-guidingtheiblanktoposition.

'Wing56-has :axpair of upstanding guide brack-.

ts '95'atits 'outer- 'edge :to locate and hold the opposite edge of theblank, 125 shown .in .Fig. 4.

*It is evident from the above construction that -''a blank maybe readilyslid into place on support :49 an'ditswinglextensions '56 and 5.1,:lwithone edge' bf-theiblank under the guides 60ato164, in-

WardIy'somewhatabove the top surface'iof the wing 'and' under :thecorner fo'ld silaps wsand 3 1, -"support" these corner folds and' theside "walls 3l and 32 atan initial-upward inclination toinsure pr'operfolding ofsuch parts when the Wings '156 and- 51 are raised.

'Wing =51 has fixed-thereon -a bracket tfi 1'1, pivotally connected withone 'end of a li-nk'.:61,rthe other end of whichis pivotally connectedwith a lever 68 which rocked by the operating rne'chariism hereafterdescribed, to raise and lower th'e' wfi'ng. Wing 55 has fixed thereon'a'ibracket 69, Fig. 1 9,-p'ivotally '--connected with c ne-end o'f alink"10, the other end of which is-pivoted to a l lever '11 which is Tocked' by mecl ianisrn here- -"after descr ibe'd, to' swing the wingtimed coordinati'on with wing-'51, 'so that the "wings'are raisedfromthe substantially horizontal position "shown' in :Fig.- 2-to theupwardly inclined position "shown-in Fig, 7 and eventually totheposition "shownin Fig. 9 'in'which they are'irrclinedseinewhatinwardly toward each oth'er. such movement, the wings fold the sideWalls 33 and 34 upwardly and fold the corner folds outwardly, therebyfolding the side walls 3| and 32 upwardly, assisted by the pressureofthe abutments 59 on wing 51, so as to position the parts of the blankas shown in Figs. 8 and 9. The final inward inclination of the wings 56and 51 tends to compress the carton and bulge the sidewalls 31 and 32inwardly as indicated at '12, Fig. -8, thereby tending to incline thetops of the corner folds inwardly and downwardly, when in their fullyfoldedposition against the side walls, to assist in ngaging'them witheach other, as more fully described hereafter.

i The means'jior tolding inwardly, engaging and interlock-ing the cornerflaps with each other in pairs, comprises preferably a pair of roundedtucking fingers '13, Figs. 1, 9, 11, and 15, one at --'-ea"ch end ofwing 51 and fixed on the opposite ends of a shaft 14 rotatably mountedin bearings -fl5 on the =under side-,of the wing. Fixed on shaft 11:4isaa, pinion--:1:E;-Fig. 11, meshing with a spur gear. 11 fixed-on -ashort shaft 18 journaled in "bearings 19 :on the wing- .Fixedpmshaft "isan ;-arm "89, Figs. 1'1 and I5, pivotal-1y connected with oneend ofalink 8| having its'other end tweenthecorner folds and the adjacent sidewalls of .the carton.

As the fingers 13 descend, they-qgn'ess' the: extensions and the-cornerfolds-:36 and 31 between themandsthefixed abutments 59 of the wing, soasto 'bowthe'corner folds outwardly, raising andretractingtheouter endsof their foldedi:p0rtions a sjndicated atr84, Fig. 10, in slightlyspaced relation with extensions 40, thus l positioning .thesepornerfolds, and their in-folded extensions -40, etc-receive between them thecooperating corner folds-35aI-1d 38 which are folded inwardly :for thatgpurpose-xby means-which will now be described.

- {lhemeans forcornpleting'the inward folding hand interlocking"of thecorner folds 35 to 38,

inclusive, comprises swinging arms *preferably smounted at the-oppositeends of both wings 56 mounted on spindles 86 supported-on the under-sides of the opposite ends of wing 5-6 and extend- "the arms to aposition in which they are inclined somewhat upwardly in the horizontalposition of -"the wing, as shown in'FigJ 2, to assist thea'butmentsss'in initiallypositioning the blank in the machine as described above.Actuating means "areprovided 'for the arms 85, operated after thefingers 13 have positioned the corner folds36 and-31,*asdescribed-and"as shown in Fig. 10,

to press the arms 85 and corner 'folds"-35-and 38 "'inwar'dly 'so as "toengage the ends of thefolds between the corner folds 36 and 31"-andtheir down-ward extensions' 'lm. 'fiuch actuating means preferablycomprises a pair"of"firigers"88,*Figs. 1, 7, 9, and 13, fixed on theopposite ends of the bpind-le 54' of tl'ie wing, respectively, theirspindle being-actuated .by' an extension 89 on one ofithe fingers; Fig;20, pivotally connected with one end of a link 90i havingaits otherzendpivotally-conis rocked by: the operating mechanism. l g; r15 Me'ansfi'are provided" .for pressing inwardly, alining and interlockingthecorner folds of each pair, comprising, preferably, .a pair of arms,Figsil, .6,.and.l1,1 in theform of resilientarms or clips each fixed onan arm 93 pivotally mounted on theJ-rear .fa'cet'o'f wing-k51 about avpintle94 extending. transversely .to the pivotal. axis of the wing. Eacharm 93 'has'ai'reversely bent extension 95 in'clined t'oC-theactive-portion 92;: of thearm assembly; for zco'operationiwithp a roller.96.; on a spindle: 91 fixed *atrits .lower: end to an arm 98,'-pinned*to*-the spindle 55 .on which the, wing 51 -:-is mounted: I Arm98 is Jpivotally connected with one end of atlink 992pivotedat itsopDOsite end -'to the' upper end of a lever I mounted onthe frame androcked by the operating mechanism. tension spring 1 ID I, Figs; B and 9,is connected between the outerend of-spindle, and aipost prisespreferably a cam I08, Figs and 17,, fixed .on. shaft :48 and coactingwith a roller I 094011- leyer :68, the roller beingheldin contact with:the cam the same time or shortly before thetucking lfingers '13 areraised; asfshown in Fig. 13, to free the corner folds 36Iand131, leavingthem inclined "iipwardly,as shown-in Fig;:l0-, While-12118300- operating'cornertfolds 35. ,andy 3;8 are in lined somewhat downwardly, .asdescribed. In ;such positions the top hooks43 at the innehzends of thelatter folds are readily engaged beneath the line of folding betweenthe'corner folds 3.6 and 31 and their inturned extensions 40. As the, arms92- are pressed inwardly, they. straighten-out the -bowed f01ds36'and31-,pressing thefolds of each pair inwardly into substantialalinementwith,

eachother', in whichlposition the'hooks'43 enter 'theslot's 42 at thetops of the cooperatingields, tointerlock'themwith eachxother. 1; i Theseveral parts, including the; wings 56 and -51, are then returned toinitial position, releasing the pressure of the wings on the sidewalls.33 "and 34 1 of the carton; whereupon. the inwardly bowed walls 3I and32.: straighten outwardly and draw theho'ok's 43 against'the ends of theslots -42. 'Theundercut portions 42. of the hooks are Ithus'brought toproject over and wedgingly'interlockwi'th theends ofathe slots andsecurelyfasten the corner folds together and the carton in erected"condition. a I

The "remaining mechanism" for operating-the several parts preferablycomprises-the oscillating *s'haft 48 described above anda plurality. ofcams fixed thereon and each provided with a follower 'mechanism; foroperatingthe several parts of "the-machine. The shaft thuscarries acamI03, Fig's. l and 9, coacting with a roller I04 carried by lever I00for oscillatingspindle 55 :and the rollers 96"which press in the sidearms 92 as described-above. A tension spring I05 has one end fixed tothe lever and the other end fixed'to a spring supporting bar. I06, Fig.2, carried :by cross "arms I01 mounted on the pedestals 46 oftheframe'the spring servingto hold thefollower III I in contact with theprofile of the cam;

fingers are mounted.

by means of'a spring IID fixed at one end of the lever and at theother-to a bar II I; carried;. ;by the cross arms I01. Aspreviously;described-letter 68. isconnected with wing 51 to swing-tnwing up and down under control of thecam;

The mechanism for operating the fingers 13, :which fold inwardly anddownwardly the exten sions and M of corner folds 3B and:31,-,com; prisespreferably a cam I I2 fixed on shaft 46,-Figs, .5- and l8, coactingwith'a rollerII3 onthe leyer 83, the roller being held in contactwiththecam by means of a spring II4 fixed atone end tothe lever and at theother end tothebar I I I thecam .described to oscillate the shaft 14,-onwhich he @The mechanism for operating the wing r folding upwardly thecarton side wall-;33 ;.com-

-prises preferably a cam II5 on shaft 48,;;l?igs. 1 5

and 19, coacting with a roller H6 on theleyer H, the roller being heldin contact with the cam by a spring I I 1 connected at one end to thelever and at the other end to the'rod I06.- The mechanism for operatingthe arms ;85,for

folding in the corner folds'35 and 38,. omprises preferably a cam II 8,Figs.- .1 and ,20, fixed;on shaft '48 and coacting with a roller- I I9onwthe lever 9| having a link and arm connection with the spindle 54carrying the fingers 88, for-actuating the arms inwardly to fold thecorner folds in,- wardly at the proper time: A spring I20 is connectedat one end with the lever and at its other .end with the rod I06, thecam operating, through the connections described, to-swing the wings topress in the corner folds'atthe proper time.

V In .the present embodiment operating-shaft is preferably rockedmanually-by meansyofga crank lever I2I and handle I2 2,-F igs.,-1, 2,and.l5,

the frame being preferably provided with upper "and lower brackets I23and I24 serving as stops for arresting the crank in its extremepositions.

It is obvious, however, that such manual operating means may be replacedby a motor dr iven mechanism, 1

The operation of the machine has bee plained in connection with theabove-description of itsconstruction, from-whichitis evident j'that ablank may be readily fed-to the machine so as to lie with its bottomsection on support-49 and one pair of opposite sidewalls on wings. 56

corner folds about their median lines 3 9..to force them outwardly andforce inwardly and raisethe other pairof side walls, 3I and 32', to aposition bowed somewhat inwardly beyond the vertical, as shown in Fig.8. Continued rotation offthe crank then causes the fingers 13 to swinginwardly and downwardly against the upper edges of the-topextensions 40and 4| of the corner f0lds 36 and 31, as shown in Figs. 8 and 9, so asto fold these top extensions downwardly between their corner folds andthe side walls of the'carton, as shown in Fig. 10. In this folding step,the flapsand their extensions I are bent or bowed outwardly and somewhatraised and separated, as shown, sothat inthe extreme lower position ofthe fingers 13, .shown in dotted lines in Fig, 10, the corners. of

the cooperating flaps 35 and 38 may be: readily .e srsniia enteredbetween the flaps as and at andntheir in' -folded top extensions.Asshownin ftill lines, Fig.- 10, the fingers-are rising, .allowing theflaps 36 and 31' to straighten somewhat "after "their folded portionshave received the ends" of -the cooperating-flaps 35and 38. i w

"Continued rotation of the crank swingsfn wardly the presser' arms orclips 92,-"Figs.=11-=an'd 13, to' further straighten and-aline theengaged corner folds andinsert the hooks 43 in their slots fl. Onfurther rotation of the crank the "fingers 88- andthe arms =92--areretracted, the wings 'sfi and areswung downwardly to horizontalposition,' releasing the carton'walls' 33 and B L-and allowing thewalls3i and 32' to straighten-and swing outwardly, thus forcing the undercutedges of the hooks into secure locking engagementwith -theends of theirslots. Thecarton then remains with one of the closure flaps underthe-positioning guides 60 to- 64, inclusive, rest- 'ing'on wing 5?, asshown in Fig. 14, in condition to-be'readily slid out of engagement-withthe lo catingguides and removed from the machine which is then ready forrepetition of the-opera tion. v

The machine is'thus adapted to quickly erect the sidewalls with theiroutwardly extending corner flaps and to efliciently bend and; positionthe corner folds for--engagement one within the folded portions oftheother and to interlock them securelywith one another to complete theerectionof the carton, The machine is'adap-ted to readilyreceive theblanks as they are' fed to it and presents the folded cartoninconvenientposition for removal from the machine, theentire operation beingrapidly; precisely,--and accura-t'ely performed.

It will thus be seen that the invention accompllshes' its objects andWhile it has been herein disclosed-by reference to the details of a'pre--ferred embodiment, it is to be understood that such disclosure isintended -in -anillustrative,

--ra therthan a-limiting sense, as it is contemplated .that variousmodifications in the construction and" arrangement of the parts willreadily occur "15A machine for folding a'blank to forma fluidtightcarton of the type having a bottom, up- 'wardly: folded side walls,corner flaps foldably connected with adjacent side wallsand foldedando-verlapped in pairs against the outer sides of "one pair-of-oppositeside wallaand intere'ngagin'g means on said flaps, respectively,for'locking'the flaps of eachjpair together, said'machine-com---p'risinga-supporh for said carton bottom,wings mounted to swingatopposi-te sides Ofs'aidSu-p- -port-fbr-folding the other pair ofopposite sidenfin walls upwardly and said corner flaps outwardlyan'd'thereby folding the first mentioned sidewalls -upwardly, devicesmovably-mounted on said wings for moving the flaps of each pair intointerlocking "engagement with each other, and mechanism fort-.65operating the parts of said machine.

=2. A'machine for folding a blank to'form a'fluid tight carton of thetype havinga bottom, up-

*wa1"d 1y'folded-side walls, corner flaps fold'ably :connected withadjacent side walls and folded-.1 :and overlapped in pairs against theouter sides "of-one-pair of opposite side wallsand interengag-i'ngdneanson said flaps. respectively, for lock- 1 ing the-flaps of each pairtogether, said machine comprising a: support for said'c'arton vbottomw,.75

wlngsaepivoted'.ltovswingaabout .parallellaizes errorposits sides: ofsaid support, respectively; for: folding= themther pair of opposite.side. walls upwardly and sai'd 'oornenflapsloutwardly and therebyfolding the first: mentioned. side: wallsv upwardly, devicespi'votallysmounted. on said wingsto swin alout axes extendingtransversely of. the pivotal axes 'of said Wings; for. moving: the;flaps ofeach pair-into lcckingzlengagement .witheach other,andrnechanism for." operating the parts of said machine. I J v A'-ma'chinefor folding ablank to form afiuid tight -carton of thefltypehaving arbottom, upwardly folded sidewalls, corner flaps foldably Fconnectedwith-adjacent. sidewalls .and folded and: overlappedinwpairssagainst the outer sides er one pair of opposite side.walls,.one flap of; each pair' having folded-portionsreceivingtherebetween the other flap-of the same'pair, and interengaging ::means.on :said-v flaps, respectively, for locking. saidiflaps of each pairtogether; said machine comprising means for folding said'siderwallsupwardly and said cornerfiaps outwardly, devices forabowing the firstmentioned flaps outwardly to retract andflposition the outer ends ofsaid folded portions'thereofi to receive the ends of said other flaps,means for engaging said other flaps between .the-folds-of thefirstmentioned fiapsandfor interlocking -said inter-engaging means, andmechanism for operating the parts of said machine,

' 41A machine for folding a blank to form afluid tight-cartonof the typehaving a bottom, upwardlyfold'edside walls and corner flaps foldablyconne'oted with adjacent. side walls and folded and 'ove'rlappeddnpairsagainst the outer sides of one pair of opposite side walls, oneflap of each pair having a-top extension f-oldedinwardly and downwardlyover the; top ofthe other flap thereof with a slot-in the line of foldofa'thefirst mentioned flap andsaid other flap having @a, top 1 00K forinterlocking engagement. with saidslot, said machine comprisingmeans forfold ng said -,S d8 walls upwardlyi and. said corner flaps outwardly,devices for foldingasaid' "top extensions: inwardly anddownwardlylrandfor bowing ,the. first mentioned flapsoutwardly-toretract and position the outer-folded ends thereof: toreceive the ends of said other flapsgnmeans for'engaging. theputer ends'of said other flapsbetween said folded portionsi of the-first mentionedflaps: presser arms forstraightening said flaps and interlocking said'tllOOkS WilFh said slots, and mechanism for operat-ing theparts' ofsaid machine.

connected withaadjacentl side ;.walls and folded and overlapped in pairsagainstthe outer sides-Jof one pair of opposite side walls, one flap.ofeach pair having folded portions receiving-therebetween the other flapof the. same. pair, and, interengaging means on said. flaps,respectively,.- for locking said ilapsiof .eachzpair' together, saidmachineicomprising means. for folding said side walls upwardly; andzsaidcorner, flaps outwardly, relatively movable devices for oppositelyengaging and bending s'aid'first. mentioned flaps to position the outerends of said folded portions thereof to receive the'ends" of saidotlier;;fiaps,.1means' for enffirst :mentionedzifiaps and: forinterlocking said uinterengaginglmeans; and mechanism,- for operz ating.the parts; ofsaid-.machine in timed coordigagingzsaid iotherjflapsbetween. the folds of the nation with each-rather.

' tight cartontof the type having a bottom; upwarde v ly foldedsidewalls, corner flaps foldably acmnected with adjacentside wallsiandirfolded and overlapped in pairs'agai'n'st themouter sides -of onepairof opposite side walls, one :flap' z of each 1 pair having foldedportions receiving'z therebetween the -other-flap of th same pain-"andinterengaging means on said fiapspzre'spectively, for locking-said-flaps of: 'each pair .together,.said machine comprising means forfolding said side ;walls upwardly and saidcorner flapsfoutwardly;devices for oppositely engaging thlfirst mentioned fiaps and positioningthe outer lends ofsaid folded portions' thereof: toreceive the ends ofsaidzother flaps; means for engaging saidzother fiapszbetween the foldsof the first'men'tioned flaps-means for laterally engaging andvalin-ingisaid engagedflaps ""to' interlock said interengaging m'eansthereof,

and mechanism for operating' 'thepartslof said machine in timedcoordination'.with each other.

7; A'machine for-folding 'ablankto-formafiuid tight carton of the typehaving abottoin, upwardly folded side walls and corner flaps foldably;connectd with adjacent side'i'walls'andfoldednand overlapped in pairsagainst the outer sidestof one tively'movable devices-for folding-saidtop-extensions inwardly and downwardly-and. forposi tioning the firstmentioned fiapstoreceive the ends'of said other fiaps, -meanstforengaging the :ends of saidother flaps between said folded-sportions ofthe first mentioned flaps and for interv locking said interenga'gingmeans thereofsfand mechanism for-operating the'partsaof saidg- -machinein timed coordination With each other.-

38; A' machine 'forxfolding a blank ,to'form a fluid tight carton; ofthe typeuhaving; a (bottom, upwardly folded side wallsan'd corner,flapsfo ldably'connected with adjacent -,side .walls'; and

folded and overlapped: inpairs' against; thQiOU-tfil sides -of oneipairof opposite side walls, one fiap F 'of each pair having atopextensionfoldedwiniwardly and downwar ly oven theit pof :the -othen 5gbeach-pair having atop extension folded infiap thereof j with a :slotfin :the -line,; of-*foldof the first mentioned fiapand said-othefiflapihavring a tophook for interlocking engagement 'with said slot,said machinecomprisingmeansfor folding said side walls upwardly and,saidcorner flaps outwardly, relatively movable. deviceswfor engagingoppositewsidesiof the first mentioned flaps to fold said top extensionsthereof inwardly and downwardly and to-bow said fia-ps outwardly toposition the outer folded: ends; thereof to; re

ceive the 'ends of said" other flaps; arm movable laterally ofsaidflapsifor engaging said other flaps between said-foldedzportions 'of thefirst mentioned flaps and to interlock said. interengaging meansrtosecure the flaps of each pair together, and mechanism for operating theparts of said machine in timed: coordination with each other.

upwardly folded" side walls, corner flaps foldably connected withadjacent nside walls and folded and overlapped in pairs agains't theoute'rsides of one pair of opposite sidewalls", one paper each1-;locki-ng said :fiapsof each pair together, said -;.machine comprisings-assupport' for said blank, 5 wings. pivoted to swing about parallelaxes at {opposite sides of said support, respectively, for

folding-said} sidewalls upwardly and said corner :flaps ,outwardly,devices pivotally mounted on done. of said wings to swing about an axisparallel iog'with said wing 'axisfor-bowing said first menione'dflapoutwardly to retract and position the .uter .ends of said foldedportions ;thereof=- to re ceive the endsof said: other-flaps betweensaid gvfolded portions, means for engaging the fiaps of 15 .eaohpairwitheach other, tointerlock said interengaging means, and;,mechanism for operating ithe- .-part ;of-said machine l10-.;;A-machine-for folding-a blank;to, form a fluid; tight cartonofthetype having a bottom, 0 upwardly folded; sidewalls, corner flapsfoldably connected with adjacent side walls and folded andoverlappedinqpairsagainst the outer sides ;ofonepair of opposite sidewalls, one flap of each pair, having folded portions receiving therebe-125 tween the other fiap of the same pair, and interengaging ,l-means;on: said ,flaps, respectively, for

,1 locking said-flaps ofieach pair together, said machine comprisingrasupport :forsaid blank, wings ,pivotedto swing about parallel axesatopposite 30 sides, of; -said -support-, respectively, for foldingsaidside' wallsxupwardly and I said corner flaps -outwardly,- devicespivotally mounted on oneof said wings-:to swing-about anaxis parallelwith ,-;said wing axis'for'bowing said first mentioned age-flapsoutwardly to retract and position the outer ends-of said foldedportionsrthereofv to receive theends of said 01 1161, fiaps between said foldedport i ons,: devices pivotallymounted on said wings to; swing-;ab outaxes transverselyfoysaid wing .m axesfor-engaging the flaps of eachpair-with :eachother-to interlock-said interengaging means,

i-g;and;; mechanism5for ,operating'the parts of said '--machine.;-

Am on mdin a blank to form a fiuidftight carton of the type having abottom, upwardly folded sidewalls and corner flaps foldably, connectedwith -adjacent=side walls and folded and-overlapped in pairs against theouter ides of one pair of opposite side walls, one flap ward1y anddownwardly 'over the top of theother ap-,. thereof --with. a slot in theline or fold of xes; at opposite sides of said support, respecvelyyforfolding said sidewalls upwardly and said; corner folds outwardly,devices pivotally 6;),:njiounted on ,one of saidwings to swing about anaxis parallelwithsaid (wing axes,-for folding said 1110p extensioninwardly and downwardly and for owing, said first mentioned flapsoutwardly. to r etract and positionthe outer folded ends thereof (i5,.-,-t o receive the-end loflsai'd other -fiaps; means for ngagingthelouter ends of saidother flaps been thev fo1ds .;of- ,thefirstmentioned flaps, resser. arms forlstraightening said fiaps and int m r nsaid hook withnsaid slots, and mech- 7 anism for operatingthe parts ofsaid machine.

,12. Allmachine forffoldinga blank to form a :tflu ii:tight.#cartonofthe type having a bottom. upwardly foldedside walls andcorner flapsfoldably connected with adjacent side walls and pair having foldedportions receiving therebe gsjfoldedrand; qverlapped; in pairs againstthe outer n trogen "-11 12 -=-'sides-of one pair of opposite side'walls; one*flap wrendsitofs-saidz otherziflapsvarmsi mounted: onzthe**ofeach pair having atop -extension folded: in- :ends;ofe-said wingstoiswing aboutjaxes'transverse a top hook for interlocking engagementwith "for said blank, wings pivoted toswing ab'o'ut 'wardly and'downwardly over the top of theother nto saidnwin saxesato; iold'qandpress the-flaps of flap' thereof with a'slot in the line of fold of theneach -pairiitoward said side walls to engage a fiap "first mentionedflap andsaid other flap-having; 30f eachipaiinbetween the folded(portions ofdthe herfiflapithereofiand;to::interlock said hooks-:in saidslots,tand mechanism for operating the parts frsaidnmachine. paraueiaxes at opposite sides of said support, .iilfiatAufmabl'linei forfolding a blankto Viorm a s'aid slot, said machine comprising a sizpportrespectively, for folding said sidewalls upwar'dlyi io ifiuid ti h arnbf hey e h bot aridsaid corner flaps outwardly,spaced'abxitiipwardly'...folded=iside walls ntcorner fiapstfoldments-ononeof said wings for engagementwith i'ably iconnejcted with; adjacent"side :xwalls and "ha'v'ing said abutments'to swing about an '-axisparallelwith the axis of said wing for'cooperai ti'on -withsaid:abiitme'nts' to foldsaid top exfirst"mentioned flaps outwardly'toretract and -said fiaps,- d'evioes pivotally mounted on the wlngioldedzandxoverlapped'in'pairs against, the'outer desiof zone pair ofoppositeside walls, one'flap fie :each L-Fpair rihaving vfolded'portions :receiving herebetween" the io'thertfiap :of-gthe same pair,rzandsinterengaging: means on said flaps; respecvely; foralockingsaidflaps'of each pair together, saidtma'chine comprising a support for saidblank,

tensions inwardly and downwardly andbow -s'aid position the outer ends:ofs'aid first mentioned flapsi-means for foldin said other flapsinwardlyi: 2o*- gs"mountedttoswing a nu p v5 and engaging and pressingthe outer-ends therepp i de 0f =Snidi"Supp0rt,' respectively, for

1= of between the folded portions ofthe'firstmen- 6lding..:thei0ther p'arxo f pp d wa up- -tioned flaps-to interlock said hooks "thereof withwardlyand said cornerfi'aps outwardly and there- -r id's t andtmechanismfor Operating-311811331133 byi fol'ding rtheffirstramentioned side walls:uD-

. -ibf aid gchi f waltdlyyimeans for :folding za' flap of each; pair 13.A machine' for folding a blank to form a fiuidtig'ht carton of thetype'having-abdttom, upwardly folded side walls and cornerfiaps'foldther'eofi inwardly; arms pivot'allysmounted onone fii=saidwings1 td 'swingii aboutran': axis" extending ransversely to '-said'wing "axis 'for' 'folding' vthe "a ly connected with adjacent sidewalls and p' c pairinto en With the '.-folded and'overlapped in pairslagainstlthe Outer?a msfirst :mentionedrsfiap thereof, -'means pivoted-.1to

first mentioned flap and said otherflap ha'vingzigs sides of one pair ofopposite side walls, one flap swlngznboiit said rwing -ax moving Saidarms,

of each .pair having a top extension" folded in- "*armfimeans'fvliiipl'essing p of'-fi p i wardly and downwardly ov'eithe top of'theother y=' 0 r o k i er n n means 5,.flapithereof'with t-m t line f {01dof t 1 ':thereof:.:.-and-mechanismafor .operatingtheeparts machine.forii'f'ol'ding a? blank to. form a top hook for n a ement with saidslot, said machine comprising asupport for said i ght carton:-ofiithetypwh avbdttom, ljiblank," wings p'ivoted to swin -"about parallel-upwardly folded-sidehwallsand corner'flaps-foldaxes at opposite sidesof said's'upp'o'rt; respectively, -ably gonne te withadjacent side wallsand for folding' said side walls upwardly 'and-saidh46 o fipli 'p a 'o l=-"cornerfolds outwardly,- devices pivotally mounted 119116" P Ofopposite sidewalls, fi l. non f said wings to swin about an""-a.XlS of:pair having?a--top extension folded-tinparallel with said wing axis forfolding-said wai dly and downwardly'over p of the other top'extensionsinwardly and-downwardly and for fifialiitheliebfiwith' W810i in theline" of foldof the bowing said first mentioned-flaps outwardly'to/5'=first= 'menti-ohed flap and said otherv fl p av retract and positionthe outer folded ends "there- D erl g n em n w h a of to receive theendsof said other flaps, devices OE Said machine comprising-a supportforrsaid pivotallymounted on saidwings to swing-about dig-blank, w -m tw g at' pp sides axes 'trans'yerse to *said i wing 1 axes, for pressings'aid suppoi't for folding/the other pair'of 'side 1 said fla'ps towardsaid sidewalls to engage the walls-*-upwai dly and-said corner'flapsoutwardly Y fla-ps' ofeach pairand interlock said hdoks with and therebyfolding the first mentioned side walls said-slots, and mechanism forop'erating the parts =-npwari1ly,'-fi s p yu on of of said machine.said-'-"wings"nfor"efolding said top extensions in- 14; A machine for'folding a blank to -*form a f d w y a d or id-fi d' t ca on of thetyphaving a bottom-,1 mentioned flapsoutwardly toposition the outer pway folded side walls and corner" flaps foldfoldedend's 'thereof forreceiving-the endsof said ably connected with adjacent side walls and Dfl alimsilfiivota'llyi mounted 011 d folded and'overlapped in pairsagainst the outer W r pre ing said-' flaps togeth r o n a e -sides ofone pair of oppositeside walls, one n dfi p "betweenithe folded P O p 9each pair having a top extension folded m the' first'm'entioned flapsand-interlock said hooks inwardly anddownwardly oventhe top f -th imsaid' slots a shaft havingoperating connecother flap'thereof with a slotin 'the'line of fold -"W Wings, fingers a d a a of the-"first'mention'ed' flap and said other flap means for rotating said shaft tooperate said mahaving a top hookfor interlockingengagement chine D wilih s aid "sl'otj'said machine comprisingasup-= 05 WILLIAMI-IJ'INMAN.

-pitfforsaid-"blank; wings mounted toi'swing j about parallel axes atopposite sides or said sup- ""QREFERENCESKCITED p respectively, Spaced'abutmenfiS'fiXd 0I1'0I1e The following references are of recordin thefingersjpixfotally mounted on "the wing 'having 79 said abutmentsto"swing about an axis parallel STATES: PATENTS with saidfwindaxis for'cooperation*with*sald "iliNumber I t fixed'abntmentsio fold s'aidtDn'extensions-in- V ghafer etal Mar. 3 wardly and downwardly and bowsaidfirst; men- 'i urmw O

